Rust-resisting alloy of iron



" following is a specification.

' understood that in small amounts of phosphorus,

other elements nearly always present in PATENT OFFICE.

GEORGE H. CHARLS, OF CANTON, OHIO.

RUST-RESISTING ALLOY OF IRON.

No Drawing. Application filed April 7,

T 0 allwhom it may concern:

Be it known that I, Gnoncn ll. OHAnLs, a citizen of the United States, and a resident of Canton, Stark county, State of Ohio, have invented an Improvement in Rust-Resisting Alloy of Iron, of which the This invention relates .to rustresisting alloys of is to provide a simple and practical alloy of iron having high rustresisting qualities. Other objects are to provide metal of the above type which shall be inexpensive, shall require no especial heat treatment, and which shall readily be formed into the desired shape. Other objects will be in part obvious and in part pointed out herein-. after.

The invention accordingly consists in the various features hereinafter set forth and more particularly defined in the following claims.

Considering now an illustrative embodiment of this invention, I propose to form iron in any well lmown way, and wish to note at this point that I use the term iron alloy in a broad sense to cover alloys in which carbon may or may not be present, according as it is or is not specified. "In other words, the term iron alloy is to include compositions which might when the carbon content is present, be -more specifically termed a steel alloy. It is also to be the alloys hereinafter dealt with there are presumably present sulfur, and

commercial iron and steel.

In the preferred embodiment of this invention, the carbon content is kept low, preferably substantially below ,20%. fact, I have found that as the carbon is reduced throughout a considerable range below the above amount, the results are improved. Even with the carbon eliminated, thus giving a simple iron compound, I have obtained excellent results.

A leading feature of this invention is the incorporation in the metal of a small amount of the element molybdenum. For good results I prefer to keep the molybdenum content below .50% and much better results are gained with much smaller roportions of this alloy. In fact, the bene cial effect increases as-the molybdenum content is reduced and I have found excellent re- Specification of Letters Patent.

iron. One of the objects thereof 1920. Serial No. 371,881.

sults with molybdenum present in a proportion ofsubstantially 15%. The molybdenum however should not be reduced to an amount equal to the amount of sulfur present.

The molybdenum is added .preferably in the form of ferro-molybdenum and is added to the molten metal in the furnace, ladle or even in the ingot, and tends to distribute itself throughout the mass of the metal. I

With ingots made in this manner, the rolling into sheets is readily accomplished or it may if desired be formed into wire or other shapes, although especially advantageous results are gained with sheets. Such sheets are resistant to rust, or corrosion, to a high degree without special heat treatment or treatment of their surface.

As variations might be made in the above illustrative embodiment of my invention or in the method by which it is made, it is to be understood that all matter herein set forth is to be interpreted as illustrative and not in a limiting sense.

I claim as my invention! 1. A rust-resisting alloy of iron comprising in combination with the iron, asmall amount of molybdenum, and not more than 20% of carbon.

2. A rust-resisting alloy of iron comprising in combination with the iron, an amount of molybdenum less than 50% and less than 20% of carbon. 3. A rust-resisting allo of iron comprising in combination with t e iron, an amount of molybdenum less than 30% and less than 20% of carbon.

4. A rust-resisting alloy of iron comprising in combination with the iron, an amount of molybdenum less than 20% and less than 20% of carbon.

5. A rust-resisting alloy of iron comprising in combination with the iron, an amqunt of molybdenum less than 16% and 'less than 20% carbon.

6. A rust-resisting alloy of iron comprising in combination with the iron, an amount of molybdenum less than 16% and more than the sulfur content, and carbon .to an amount less than 20%.

7. A rust-resisting alloy of iron comprising in combination with the iron, a small amount of molybdenum, and less than 10% of carbon.

8. A rust-resisting alloy. of iron compris- Patented Oct. 12, 1920.

ing in combination with the iron, a small and less than .06 0

9. A rust-resisting alloy of iron compris- 5 ing in-combination with the iron, molybdenum to an amount less than 16%.

10. A rust-resisting alloy of iron comprising in combination With the iron, less than 11% of carbon, and less than .1670 of molybdenum the molybdenum being in It excess of the sulfur content.

In testimony whereof, I have signed my; name to this specification this 3rd day of March, 1920.

GEORGE H. CHARLS. 

